1inetd_child_selinux(8) SELinux Policy inetd_child inetd_child_selinux(8)
2
6 inetd_child_selinux - Security Enhanced Linux Policy for the in‐
7 etd_child processes
8
10 Security-Enhanced Linux secures the inetd_child processes via flexible
11 mandatory access control.
12 The inetd_child processes execute with the inetd_child_t SELinux type.
14 You can check if you have these processes running by executing the ps
15 command with the -Z qualifier.
16 For example:
18 ps -eZ | grep inetd_child_t
20
24 The inetd_child_t SELinux type can be entered via the in‐
25 etd_child_exec_t, usr_t, bin_t file types.
26 The default entrypoint paths for the inetd_child_t domain are the fol‐
28 lowing:
29 All executables with the default executable label, usually stored in
31 /usr/bin and /usr/sbin. /usr/sbin/in..*d,
32 /usr/lib/pysieved/pysieved.*.py, /usr/local/lib/pysieved/pysieved.*.py,
33 /usr/sbin/identd, /opt/.*, /usr/.*, /emul/.*, /export(/.*)?, /os‐
34 tree(/.*)?, /usr/doc(/.*)?/lib(/.*)?, /usr/inclu.e(/.*)?,
35 /usr/share/rpm(/.*)?, /usr/share/doc(/.*)?/README.*, /usr/lib/mod‐
36 ules(/.*)/vmlinuz, /usr/lib/modules(/.*)/initramfs.img, /usr/lib/sysim‐
37 age(/.*)?, /usr/lib/ostree-boot(/.*)?, /opt, /usr, /emul
38
40 SELinux defines process types (domains) for each process running on the
41 system
42 You can see the context of a process using the -Z option to ps
44 Policy governs the access confined processes have to files. SELinux
46 inetd_child policy is very flexible allowing users to setup their in‐
47 etd_child processes in as secure a method as possible.
48 The following process types are defined for inetd_child:
50 inetd_child_t
52 Note: semanage permissive -a inetd_child_t can be used to make the
54 process type inetd_child_t permissive. SELinux does not deny access to
55 permissive process types, but the AVC (SELinux denials) messages are
56 still generated.
57
60 SELinux policy is customizable based on least access required. in‐
61 etd_child policy is extremely flexible and has several booleans that
62 allow you to manipulate the policy and run inetd_child with the tight‐
63 est access possible.
64 If you want to deny user domains applications to map a memory region as
68 both executable and writable, this is dangerous and the executable
69 should be reported in bugzilla, you must turn on the deny_execmem bool‐
70 ean. Enabled by default.
71 setsebool -P deny_execmem 1
73 If you want to control the ability to mmap a low area of the address
77 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
78 the mmap_low_allowed boolean. Disabled by default.
79 setsebool -P mmap_low_allowed 1
81 If you want to disable kernel module loading, you must turn on the se‐
85 cure_mode_insmod boolean. Enabled by default.
86 setsebool -P secure_mode_insmod 1
88 If you want to allow unconfined executables to make their heap memory
92 executable. Doing this is a really bad idea. Probably indicates a
93 badly coded executable, but could indicate an attack. This executable
94 should be reported in bugzilla, you must turn on the selinuxuser_ex‐
95 echeap boolean. Disabled by default.
96 setsebool -P selinuxuser_execheap 1
98 If you want to allow unconfined executables to make their stack exe‐
102 cutable. This should never, ever be necessary. Probably indicates a
103 badly coded executable, but could indicate an attack. This executable
104 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
105 stack boolean. Enabled by default.
106 setsebool -P selinuxuser_execstack 1
108
112 SELinux defines port types to represent TCP and UDP ports.
113 You can see the types associated with a port by using the following
115 command:
116 semanage port -l
118 Policy governs the access confined processes have to these ports.
121 SELinux inetd_child policy is very flexible allowing users to setup
122 their inetd_child processes in as secure a method as possible.
123 The following port types are defined for inetd_child:
125 inetd_child_port_t
128 Default Defined Ports:
132 tcp 1,9,13,19,512,544,891,892,5666
133 udp 1,9,13,19,891,892
134
136 The SELinux process type inetd_child_t can manage files labeled with
137 the following file types. The paths listed are the default paths for
138 these file types. Note the processes UID still need to have DAC per‐
139 missions.
140 file_type
142 all files on the system
144
147 SELinux requires files to have an extended attribute to define the file
148 type.
149 You can see the context of a file using the -Z option to ls
151 Policy governs the access confined processes have to these files.
153 SELinux inetd_child policy is very flexible allowing users to setup
154 their inetd_child processes in as secure a method as possible.
155 STANDARD FILE CONTEXT
157 SELinux defines the file context types for the inetd_child, if you
159 wanted to store files with these types in a diffent paths, you need to
160 execute the semanage command to sepecify alternate labeling and then
161 use restorecon to put the labels on disk.
162 semanage fcontext -a -t inetd_child_var_run_t '/srv/myinetd_child_con‐
164 tent(/.*)?'
165 restorecon -R -v /srv/myinetd_child_content
166 Note: SELinux often uses regular expressions to specify labels that
168 match multiple files.
169 The following file types are defined for inetd_child:
171 inetd_child_exec_t
175 - Set files with the inetd_child_exec_t type, if you want to transition
177 an executable to the inetd_child_t domain.
178 Paths:
181 /usr/sbin/in..*d, /usr/lib/pysieved/pysieved.*.py, /usr/lo‐
182 cal/lib/pysieved/pysieved.*.py, /usr/sbin/identd
183 inetd_child_tmp_t
186 - Set files with the inetd_child_tmp_t type, if you want to store inetd
188 child temporary files in the /tmp directories.
189 inetd_child_var_run_t
193 - Set files with the inetd_child_var_run_t type, if you want to store
195 the inetd child files under the /run or /var/run directory.
196 Note: File context can be temporarily modified with the chcon command.
200 If you want to permanently change the file context you need to use the
201 semanage fcontext command. This will modify the SELinux labeling data‐
202 base. You will need to use restorecon to apply the labels.
203
206 semanage fcontext can also be used to manipulate default file context
207 mappings.
208 semanage permissive can also be used to manipulate whether or not a
210 process type is permissive.
211 semanage module can also be used to enable/disable/install/remove pol‐
213 icy modules.
214 semanage port can also be used to manipulate the port definitions
216 semanage boolean can also be used to manipulate the booleans
218 system-config-selinux is a GUI tool available to customize SELinux pol‐
221 icy settings.
222
225 This manual page was auto-generated using sepolicy manpage .
226
229 selinux(8), inetd_child(8), semanage(8), restorecon(8), chcon(1), se‐
230 policy(8), setsebool(8)
231inetd_child 21-06-09 inetd_child_selinux(8)